CN107884815A - Suitable for the detonator anti-drop device and method of tunnel seismic wave method advance geologic prediction - Google Patents

Suitable for the detonator anti-drop device and method of tunnel seismic wave method advance geologic prediction Download PDF

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Publication number
CN107884815A
CN107884815A CN201711328442.9A CN201711328442A CN107884815A CN 107884815 A CN107884815 A CN 107884815A CN 201711328442 A CN201711328442 A CN 201711328442A CN 107884815 A CN107884815 A CN 107884815A
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China
Prior art keywords
detonator
sleeve body
seismic wave
sleeve
wave method
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Granted
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CN201711328442.9A
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CN107884815B (en
Inventor
李术才
曲传奇
薛翊国
马新民
李欣
邱道宏
苏茂鑫
李志强
陶宇帆
张开
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Shandong University
China Railway 18th Bureau Group Co Ltd
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Shandong University
China Railway 18th Bureau Group Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02Generating seismic energy
    • G01V1/04Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02Generating seismic energy
    • G01V1/104Generating seismic energy using explosive charges

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

The invention discloses the detonator anti-drop device and method suitable for tunnel seismic wave method advance geologic prediction, drilling head including sleeve body and positioned at sleeve body front end, sleeve body is two-part Split type structure with drilling head, two Split type structures by connector connected embedding together, it is integrally formed, forms an independent closing space;Leave detonator pipeline mouth in the end of the sleeve body.The present invention is convenient and practical, cost is cheap, can effectively prevent the problem that comes off of explosive and detonator in the forecast of tunnel seismic wave method, add operating efficiency, reduces unnecessary cost and wastes.

Description

Suitable for the detonator anti-drop device and method of tunnel seismic wave method advance geologic prediction
Technical field
The present invention relates to a kind of detonator anti-drop device and method suitable for tunnel seismic wave method advance geologic prediction.
Background technology
Tunnel seismic wave method advance geologic prediction advanced geology prediction system be exclusively for tunneling and underground engineering in advance The equipment that matter forecast is developed, it is carried for convenience of the geological condition quickly in the range of 100~350m of forecast front of tunnel heading A kind of strong Method and kit for is supplied.
Seismic wave method advanced geology prediction system is to utilize seismic wave caused reflection characteristics in unevenly plastid To forecast the geological condition of tunnel front of tunnel heading and surrounding close region, such as irregular body, discontinuity surface, tomography and crushed zone Deng.During seismic wave method advance geologic prediction, to make energy to rock stratum internal communication, strengthen reflected signal can resolution, Very high requirement is proposed to the installation standard of live emulsion and detonator, the installation of failure can cause the road reflected signal Failure, unnecessary time and cost is caused to waste.And emulsion is due to coarse inside its softer characteristic and blasthole Injustice, the detonator for inserting explosive are easy to come off during explosive is pushed into blasthole, not only cause to ignite, focus loses Effect, especially because explosive can not take out and caused by great potential risk.
At present, solves this problem still without effective device, site operation would generally be by detonator insertion end towards blasthole Push it into, although this measure reduces the probability that detonator comes off, but still do not solve this problem, this hair fundamentally It is bright to aim to solve the problem that the problem of common in the forecast of this tunnel seismic wave method.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of detonator suitable for tunnel seismic wave method advance geologic prediction Anti-drop device and method, structure of the present invention is very simple, and cost is cheap, can effectively prevent explosive in the forecast of tunnel seismic wave method With the problem that comes off of detonator, operating efficiency is added, reduces unnecessary cost and wastes.
To achieve these goals, the present invention adopts the following technical scheme that:
A kind of detonator anti-drop device suitable for tunnel seismic wave method advance geologic prediction, including sleeve body and be located at The drilling head of sleeve body front end, sleeve body are two-part Split type structure with drilling head, and two Split type structures pass through company Fitting connected embedding together, is integrally formed, and forms an independent closing space;
Leave detonator pipeline mouth in the end of the sleeve body.
The connector is to be arranged on the rectangular recess on the inside of one Split type structure of sleeve body, and another Split type structure The long column shape in outside is raised, and sleeve body can be attached to lock jail by both engagings.
The groove of the sleeve body and projection, are all integrally formed with sleeve body, and after sleeve body closure, the projection is certainly It is dynamic to be caught in groove, by sleeve lock jail.
The connector is the gim peg and neck for being separately positioned on two Split type structures of sleeve body, gim peg and neck Mate with each other, sleeve body is attached by lock jail by both engagings.
The drilling head is divided into two parts, is integrally formed with sleeve body, and after sleeve closure, drilling head is in triangle taper, And tip is outwards.The device for having explosive can be made effectively to go deep into inside blasthole, the device can again consolidated after being pushed into Insertion blasthole in front of in Rock And Soil, greatly improve the reliability and success rate of epicenter excitation.
The afterbody pipeline mouth, it is divided into two parts up and down, itself turns into closed circle after sleeve closure, diameter is more than detonator Pipeline diameter, less than detonator bond length, effectively it can prevent detonator from coming off.
Preferably, described sleeve body and drilling head are PP plastic materials.
Preferably, described compliant sleeve dose according to needed for differently seismic wave method blasthole, is respectively equipped with 50g, 100g etc. Different size.
Sleeve body is cylinder, suits explosive shape itself.
Method of work based on said apparatus, sleeve body is opened, the emulsion of well cutting is put together with detonator Enter in sleeve body, detonator pipeline is positioned at tail end detonator pipeline mouth, and two parts above and below sleeve body are closed, by sleeve sheet Body card jail, detonator pipeline are drawn in tail end detonator pipeline mouth, the device closed are put into blasthole, and drilling head forward, will cover The position that cylinder push-in blasthole depths measures, ensures into hole depth.
Compared with prior art, beneficial effects of the present invention are:
It is simple in construction, cost is cheap, emulsion can be firmly locked in by the gim peg on sleeve and neck by set Cylinder is internal, and afterbody pipeline mouth effectively can prevent detonator from coming off because its diameter is less than detonator cross section, and sleeve is as stress knot Structure can avoid emulsion from deforming or decompose during blasthole is pushed into, and the drilling head of barrel forward end can make sleeve more Deeply, the problem of avoiding the distance deficiency filled in due to explosive caused by rough inside blasthole, considerably increases work Efficiency, reduce unnecessary cost and waste.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is the overall Unclosing structure figure of the present invention;
Fig. 2 is the unitary closed structure chart of the present invention;
Fig. 3 is front view of the present invention;
In figure, sleeve (1), detonator pipeline mouth (2), sleeve junction (3), sleeve outside is raised (4), sleeve inboard groove (5) head (6), is crept into.
Embodiment:
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
In the present invention, term as " on ", " under ", "left", "right", "front", "rear", " vertical ", " level ", " side ", The orientation or position relationship of instructions such as " bottoms " are based on orientation shown in the drawings or position relationship, only to facilitate describing this hair Bright each part or component structure relation and the relative determined, not refer in particular to either component or element in the present invention, it is impossible to understand For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " should be interpreted broadly, and expression can be fixedly connected, Can also be integrally connected or be detachably connected;Can be joined directly together, can also be indirectly connected by intermediary.For The related scientific research of this area or technical staff, the concrete meaning of above-mentioned term in the present invention can be determined as the case may be, It is not considered as limiting the invention.
As background technology is introduced, emulsion in the prior art be present due in its softer characteristic and blasthole Portion it is rough, insert explosive detonator be easy to by explosive be pushed into blasthole during come off, not only cause to draw It is quick-fried, focus failure, especially because explosive can not take out and caused by great potential risk deficiency, in order to which the technology solved as above is asked Topic, present applicant proposes one kind to be applied to tunnel seismic wave method forecast emulsion and detonator anti-drop device and application method, Including integral sleeve and front end drilling head two large divisions, sleeve is all divided into two parts up and down, sleeve and drilling head with drilling head Upper part links together, and is integrally formed, and lower part is as the same.Sleeve afterbody leaves detonator pipeline mouth, and upper cartridge point inner side has One rectangular recess, lower part outside have a wire raised, and sleeve can be locked jail in itself at closure by both.
The sleeve, it is divided into two parts up and down, front end is drilling head, and afterbody leaves detonator pipeline mouth.
The drilling head is divided into two parts up and down, is integrally formed in itself with sleeve, and after sleeve closure, drilling head is in pyrometric cone Shape, can be such that the device for having explosive effectively gos deep into inside blasthole, the insertion big gun that the device can again consolidated after being pushed into In front of hole in Rock And Soil, the reliability and success rate of epicenter excitation are greatly improved.
The sleeve recess is raised with sleeve, is all integrally formed in itself with sleeve, and after sleeve closure, the projection is caught in automatically In groove, by sleeve lock jail.
The afterbody pipeline mouth, its a diameter of 3mm, it is divided into two parts up and down, itself turns into closed circle after sleeve closure, Diameter is slightly larger than detonator pipeline diameter, less than detonator bond length, effectively can prevent detonator from coming off.
Preferably, described sleeve and drilling head are from cost is cheap, PP plastic materials of reliable in quality.
Preferably, described compliant sleeve dose according to needed for differently seismic wave method blasthole, is respectively equipped with 50g, 100g etc. Different size.
In a kind of typical embodiment of the application, as shown in Figure 1-Figure 3, including sleeve (1), detonator pipeline mouth (2), Sleeve junction (3), sleeve outside is raised (4), sleeve inboard groove (5), drilling head (6).It is overall to be all formed in one, it is convenient It is practical.Front end drilling head can ensure the hole depth that enters of the device, and tail end pipeline mouth can prevent detonator from coming off.Sleeve is generally Cylinder, suits explosive shape itself, and sleeve relies on the groove of both sides up and down to be fixed with projection.
The present invention the course of work be:Sleeve (1) is opened, the emulsion of well cutting is put into sleeve together with detonator (1) in, detonator pipeline is positioned over tail end detonator pipeline mouth (2) place, and two parts above and below sleeve are closed, will by neck (4) (5) Sleeve blocks jail in itself, and detonator pipeline is drawn in tail end detonator pipeline mouth (2), the device closed is put into blasthole, creeps into head Forward, the position measured sleeve push-in blasthole depths with related device, end-of-job.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.

Claims (9)

1. suitable for the detonator anti-drop device of tunnel seismic wave method advance geologic prediction, it is characterized in that:Including sleeve body and Drilling head positioned at sleeve body front end, sleeve body are two-part Split type structure with drilling head, and two Split type structures lead to Cross connector connected embedding together, be integrally formed, form an independent closing space;
Leave detonator pipeline mouth in the end of the sleeve body.
2. it is applied to the detonator anti-drop device of tunnel seismic wave method advance geologic prediction, its feature as claimed in claim 1 It is:The connector is to be arranged on the rectangular recess on the inside of one Split type structure of sleeve body, and on the outside of another Split type structure Long column shape it is raised, sleeve body can be attached by both engagings by lock jail.
3. it is applied to the detonator anti-drop device of tunnel seismic wave method advance geologic prediction, its feature as claimed in claim 1 It is:The groove of the sleeve body and projection, are all integrally formed with sleeve body, after sleeve body closure, the raised automatic clamping Enter in groove, by sleeve lock jail.
4. it is applied to the detonator anti-drop device of tunnel seismic wave method advance geologic prediction, its feature as claimed in claim 1 It is:The connector is the gim peg and neck for being separately positioned on two Split type structures of sleeve body, and gim peg and neck are each other It is engaged, sleeve body is attached by lock jail by both engagings.
5. it is applied to the detonator anti-drop device of tunnel seismic wave method advance geologic prediction, its feature as claimed in claim 1 It is:The drilling head is divided into two parts, is integrally formed with sleeve body, and after sleeve closure, drilling head is in triangle taper, and tip Outwards.
6. it is applied to the detonator anti-drop device of tunnel seismic wave method advance geologic prediction, its feature as claimed in claim 1 It is:The afterbody pipeline mouth, it is divided into two parts up and down, itself turns into closed circle after sleeve closure, diameter is more than detonator pipeline Diameter, less than detonator bond length, effectively it can prevent detonator from coming off.
7. it is applied to the detonator anti-drop device of tunnel seismic wave method advance geologic prediction, its feature as claimed in claim 1 It is:The specification of described sleeve body dose according to needed for differently seismic wave method blasthole is adjusted.
8. it is applied to the detonator anti-drop device of tunnel seismic wave method advance geologic prediction, its feature as claimed in claim 1 It is:Sleeve body is cylinder, suits explosive shape itself.
9. based on the method for work of the device as any one of claim 1-8, it is characterized in that:Sleeve body is opened, will The emulsion of well cutting is put into sleeve body together with detonator, and detonator pipeline is positioned at tail end detonator pipeline mouth, will Two parts are closed sleeve body up and down, and by sleeve body card jail, detonator pipeline is drawn in tail end detonator pipeline mouth, by what is closed Device is put into blasthole, and drilling head forward, the position that sleeve push-in blasthole depths is measured, ensures into hole depth.
CN201711328442.9A 2017-12-13 2017-12-13 Detonator anti-drop device and method suitable for advanced geological prediction by tunnel seismic wave method Active CN107884815B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109375255A (en) * 2018-09-03 2019-02-22 山东大学 The explosive detonator device and method of tunnel seismic wave method advance geologic prediction
CN112835094A (en) * 2021-01-06 2021-05-25 中国电建集团贵阳勘测设计研究院有限公司 Seismic wave method tunnel advance geology forecast explosive package installation device

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB532091A (en) * 1939-08-17 1941-01-16 Ernst Schneider Improvements in means for securing detonators with attached fuzes, or electric detonators, in explosive charges
GB636792A (en) * 1948-05-03 1950-05-03 Du Pont Electric blasting initiators and methods of producing the same
FR1068900A (en) * 1952-09-27 1954-07-01 Explosive cartridge with device for protecting the firing devices
GB913747A (en) * 1959-10-17 1962-12-28 Suisse Des Explosifs Soc Equipment for detonating explosive charges
EP0142717A1 (en) * 1983-11-17 1985-05-29 Manfred Meul Blasting device for precision blasting
US20060185898A1 (en) * 2005-02-23 2006-08-24 Dale Seekford Method and apparatus for stimulating wells with propellants
AU2009280163A1 (en) * 2008-08-05 2010-02-11 Global Seismic Solutions Limited Methodology for waterproofing primed seismic explosive assemblies
US20100089270A1 (en) * 2007-02-02 2010-04-15 Mattson Inter Tool Gmbh Rock-blasting cartridge and blasting method
CN102893119A (en) * 2010-02-03 2013-01-23 简-阿克.本特森 Rock blasting cartridge and ignition detonator
CN103983144A (en) * 2014-05-19 2014-08-13 辽宁庆阳民爆器材有限公司 Anti-dropping detonation tool
CN204268980U (en) * 2014-11-14 2015-04-15 辽宁庆阳民爆器材有限公司 Containing energy emulsion explosive-source explosive post
CN104613834A (en) * 2015-01-23 2015-05-13 山东大学 Placing device for TSP blast hole emulsion explosive and operation method
CN105509583A (en) * 2015-12-25 2016-04-20 天津宏泰华凯科技有限公司 Dampproof explosive bracket
CN105547066A (en) * 2015-12-15 2016-05-04 山东大学 Storage device for tunnel seismic prediction (TSP) blast hole emulsion explosive and operating method of storage device
CN207557496U (en) * 2017-12-13 2018-06-29 山东大学 Suitable for the detonator anti-drop device of tunnel seismic wave method advance geologic prediction

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB532091A (en) * 1939-08-17 1941-01-16 Ernst Schneider Improvements in means for securing detonators with attached fuzes, or electric detonators, in explosive charges
GB636792A (en) * 1948-05-03 1950-05-03 Du Pont Electric blasting initiators and methods of producing the same
FR1068900A (en) * 1952-09-27 1954-07-01 Explosive cartridge with device for protecting the firing devices
GB913747A (en) * 1959-10-17 1962-12-28 Suisse Des Explosifs Soc Equipment for detonating explosive charges
EP0142717A1 (en) * 1983-11-17 1985-05-29 Manfred Meul Blasting device for precision blasting
US20060185898A1 (en) * 2005-02-23 2006-08-24 Dale Seekford Method and apparatus for stimulating wells with propellants
US20100089270A1 (en) * 2007-02-02 2010-04-15 Mattson Inter Tool Gmbh Rock-blasting cartridge and blasting method
AU2009280163A1 (en) * 2008-08-05 2010-02-11 Global Seismic Solutions Limited Methodology for waterproofing primed seismic explosive assemblies
CN102893119A (en) * 2010-02-03 2013-01-23 简-阿克.本特森 Rock blasting cartridge and ignition detonator
CN103983144A (en) * 2014-05-19 2014-08-13 辽宁庆阳民爆器材有限公司 Anti-dropping detonation tool
CN204268980U (en) * 2014-11-14 2015-04-15 辽宁庆阳民爆器材有限公司 Containing energy emulsion explosive-source explosive post
CN104613834A (en) * 2015-01-23 2015-05-13 山东大学 Placing device for TSP blast hole emulsion explosive and operation method
CN105547066A (en) * 2015-12-15 2016-05-04 山东大学 Storage device for tunnel seismic prediction (TSP) blast hole emulsion explosive and operating method of storage device
CN105509583A (en) * 2015-12-25 2016-04-20 天津宏泰华凯科技有限公司 Dampproof explosive bracket
CN207557496U (en) * 2017-12-13 2018-06-29 山东大学 Suitable for the detonator anti-drop device of tunnel seismic wave method advance geologic prediction

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
周轮;李术才;许振浩;李利平;黄鑫;何树江;李国豪;: "隧道综合超前地质预报技术及其工程应用", 山东大学学报(工学版), vol. 47, no. 02, pages 55 - 62 *
杨冠洲: "用聚能爆破方法处理水井钻具事故", no. 06, pages 60 *
许振浩;李术才;张庆松;李利平;张霄;高阳;原小帅;: "组合爆破法TSP超前地质预报研究", vol. 39, no. 04, pages 45 - 50 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109375255A (en) * 2018-09-03 2019-02-22 山东大学 The explosive detonator device and method of tunnel seismic wave method advance geologic prediction
CN112835094A (en) * 2021-01-06 2021-05-25 中国电建集团贵阳勘测设计研究院有限公司 Seismic wave method tunnel advance geology forecast explosive package installation device

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